Table 3 Spearman's rank correlation (r) of the marker order for the comparison among the three population-specific B. napus maps, BnaSNDH_05_2010a, BnaSGDH_03_2010a and BnaDYDH_05_2010a, comparison between each of the three population-specific maps and each of the two integrated maps, BnaWAIT_01_2010a generated by JoinMap and BnaWAIT_01_2010b generated by MergeMap and comparison between the two integrated maps, BnaWAIT_01_2010a and BnaWAIT_01_2010b.